Maven maintenance
Maven maintenance

- maven-eclipse-plugin 2.9 -> 2.10
- maven-pmd-plugin 3.4 -> 3.5
- Removed obsolete/invalid repository-dev-java-net profile
- Configure file.encoding for surefire to be UTF-8

chriswhite199/greenmail,Chessray/greenmail,greenmail-mail-test/greenmail,buildscientist/greenmail,chriswhite199/greenmail,marcelmay/greenmail,buildscientist/greenmail,buildscientist/greenmail,Chessray/greenmail,greenmail-mail-test/greenmail,buildscientist/greenmail,marcelmay/greenmail,Chessray/greenmail,buildscientist/greenmail,marcelmay/greenmail,chriswhite199/greenmail,chriswhite199/greenmail,marcelmay/greenmail,marcelmay/greenmail,greenmail-mail-test/greenmail,Chessray/greenmail,chriswhite199/greenmail